Front doors carry ‘thin patina’ of poop bacteria

Front doors carry ‘thin patina’ of poop bacteria

By Erika Engelhaupt, 12:36 PM July 17, 2014

This image might have you thinking twice before knocking.

A new map called “The Patina of Feces” shows that the outer door frames of American homes wear a thin veneer of microbes that are normally found in animals’ guts. Given that the microbes had to leave those guts to travel door to door, they probably came from someone’s, or something’s, poop.

“No reason to freak out,” says project coleader Noah Fierer of the University of Colorado Boulder. We already knew that fecal bacteria are floating a...

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